"Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 31 December 2017.(Note: This list is newer than the one used by plants.usda.gov and is more up-to-date.)
Hall, Susan H.; Galletta, G. J. (1971). "Comparative Chromosome Morphology of Diploid Vaccinium Species1". Journal of the American Society for Horticultural Science. 96 (3). American Society for Horticultural Science: 289–292. doi:10.21273/jashs.96.3.289. ISSN0003-1062.
Hall, Susan H.; Galletta, G. J. (1971). "Comparative Chromosome Morphology of Diploid Vaccinium Species1". Journal of the American Society for Horticultural Science. 96 (3). American Society for Horticultural Science: 289–292. doi:10.21273/jashs.96.3.289. ISSN0003-1062.